Stone-crusher.



PATENTED NOV. 12, 1907.

E. C. HODGES. STONE GRUSHBR.

APPLICATION FILED MAY 3, 190a.

11m NORRIS PETERS cm. WASHINGTLN. n, c,

EMERY C. HODGES, OF BLOOMINGTON, ILLINOIS.

STONE-CRUSHER.

Specification of LettersPatent.

Patented Nov. 12, 1907.

Application filed May 8,1906. Serial No. 315,082.

To all whom it may concern;

Be it known that I, EMERY 0. Houses, a citizen of the United States, residing at Bloomington, in the county of McLean and State of Illinois, haveinvented certain new and useful Improvements in Stone-Crushers, of which thefollowing is a specification.

My invention relates to improvements in stone crushers, and refers in particular to a machine for pulverizing or powdering stone.

The main object of the invention, is the provision of a machine of this character possessing great durability and crushing power, and which will have a large capacity to quickly reduce the stone or rock to a fine powder, said powder to be used for building purposes.

A further object of the invention is the provision of a pulverizing machine consisting of but few and simple parts, which will operate with a small consumption of power, and which will be thoroughly practical and efficient for the purposes intended.

With these objects in view, my invention consists of a divided hopper, crushing rolls beneath said hopper, and pairs of pulverizing rolls adapted to receive material from the crushing rolls.

My invention also consists of a stone crusher embodying certain other novel features of construction, combination and arrangement of parts substantially as disclosed herein.

Figure 1, is an end elevation of my improved stone crusher. Fig. 2, is a transverse sectional view thereof. Fig. 3, is a longitudinal sectional view of the same. Fig. 1, is a detail view of the pulverizer rolls.

Referring to the drawings in detail: The numeral 1, designates the hopper of the machine which is formed with tapering side walls extending below the edge of and within the housing 2, A longitudinal dividing partition 3, divides the lower portion of the hopper, and extending downward from the dividing partition are the crusher plates 4, formed with the curved bed portion 5, and the overhanging edge or lip 6. The crusher plates are formed with the spaced and alined crusher teeth 7, and these teeth may be of blunt pyramid shape as shown, or they may be of other formation. Secured upon the shafts 8, journaled above the crusher plates, are the crusher rolls 9, provided with similarly-alined and spaced crusher teeth 10, adapted to cooperate with and pass between the teeth of the crusher bed. Slantingly-disposed deflecting plates or fenders 11, are

mounted opposite the edges of the crusher plates and serve to deflect the crusher material downward.

Journaled beneath the crusher plates and on opposite sides of the opening between the edge of the crusher plate and fender, are the pairs of shafts 12, having mounted thereon the pulverizer rolls 13. These rolls are provided with the alternating circular crushing rims or flanges 14, and mounted over the outermost roll, is a curved deflector plate 15. The base of the housing is in the form of a hopper having slanting side walls 16, terminating in a central chute or passage 17, which conducts the powdered stone to the proper receptacle.

The two upper crusher rolls and the two outer pulverizer rolls are connected together and all driven at the same slow rate of speed by means of the gears 18, on the extended ends of the shafts, but the two inner pulver izer rolls by means of the gear wheels 19, are driven at a higher rate of speed than the other rolls, so that the crushed stone when it reaches the pulverizing rolls, is submitted to a grating as well as a crushing action, and is reduced to a very fine powder.

The pulverized stone which is the product of my improved stone crusher may be employed for a variety of purposes, and is particularly useful in the manufacture of artificial stone and similar building compositions.

From the above description taken in connection with the drawings it will be evident that I have provided a stone pulverizer which accomplishes all the objects heroinset forth, and is of great practical utility.

I claim:

In a stone crusher, the combination with a housing having a hopper entrance, of a tapering partition having its upper terminal at the foot of the hopper portion and terminating at the lower end in a concaved crusher plate extended horizontally on both sides to form curved crusher beds. the edges or the bed being provided with overhanging lips, said crusher beds provided with pyramidal teeth, crusher rolls journaled above the crusher beds and provided with corresponding co-acting crusher teeth, pairs of pulvcrizer rolls provided with intermeshing ridges journnled beneath the overhanging lips of the crusher beds and rotated at different rates of speed, deflecting plates depending from the walls of the housing and overhanging the pulvcrizer rolls, the housing having an inclined bottom terminating in a delivery chute.

In testimony whereof I afllx my signature in presence of two witnesses.

EMERY C. HODGES.

Witnesses W. M. Hoummu, WM. N. Moon. 

